Q. A principal of 10000 Rs. after 2 years compounded annually, the rate of interest being 10% per annum during the first year and 12% per annum during the second year will amount is :
Answer: 12320 Rs.
Notes: $latex A = P\left ( 1+\frac{r_{1}}{100} \right )\left ( 1+\frac{r_{2}}{100} \right )&s=1$ $latex = 10000\left ( 1+\frac{10}{100} \right )\left ( 1+\frac{12}{100} \right )&s=1$ $latex = 10000\times \frac{11}{10}\times \frac{28}{25}&s=1$ $latex = 12320\ Rs.$ Hence option [C] is correct answer.

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